KR101288616B1 - Diaphragm pump - Google Patents

Abstract

Diaphragm pump is disclosed. Diaphragm pump of the present invention, the main housing; A motor coupled to the lower side of the main housing; A diaphragm pump driving unit coupled to the driving shaft of the motor to supply air to the car seat airbag by horizontally moving by the power transmitted from the motor; A valve housing coupled to the upper side of the main housing; And it characterized in that it comprises an exhaust valve provided inside the valve housing to discharge the air filled in the car seat airbag to the outside. According to the present invention, the external exhaust valve and the safety valve can be integrated to simplify the structure and reduce the volume occupied by the device, thereby achieving cost reduction and maintenance convenience.

Description

Diaphragm Pump

The present invention relates to a diaphragm pump, and more particularly, a diaphragm pump that can reduce costs and maintain convenience by integrating an external exhaust valve and a safety valve to simplify the structure and reduce the volume of the device. It is about.

Diaphragm Pump (Diaphragm Pump) is a type of volumetric pump that draws in and discharges fluid by the movement of diaphragm. That is, the diaphragm pump operates to inhale and discharge the fluid as the diaphragm vibrates and the pressure of the pump chamber changes. The diaphragm pump is used to operate the pump without the direct contact with the fluid to be applied. Say.

The conventional diaphragm pump has a structure in which an upper housing having an annular rib formed on an inner circumferential surface thereof and a lower housing to which a motor shaft is coupled are coupled to each other, and a valve support having suction and discharge holes formed between the upper housing and the lower housing. In addition, the space between the outer side of the annular rib and the valve support forms an inlet chamber in which fluid to be sucked remains, and the space between the inner side of the annular rib and the valve support forms an outlet chamber through which fluid is discharged, and the valve support and the lower portion. Between the housings are formed a plurality of pump chambers in which a pressure change occurs to suck and discharge the fluid.

And the valve support is supported by a valve for opening and closing the suction and discharge holes respectively, the lower housing is supported by a motor shaft, the shaft is fixed to the eccentric shaft is installed, the outer periphery of the shaft with a bearing coupled to the lower housing Supported. In addition, the lower housing is formed with a plurality of openings in communication with each pump chamber, each opening is provided with a movable member and a fixed member fixed to the movable member is oscillated from side to side in conjunction with the eccentric rotation bearing. And the edge between the moving member and the fixing member with the diaphragm is interposed between the valve support and the lower housing is fixed.

According to such a configuration, the conventional diaphragm pump vibrates left and right sequentially by moving bearings eccentrically and at the same time the diaphragm of each part sequentially vibrates from side to side as the pressure in each pump chamber decreases or increases. Inlet and outlet valves are operated in sequence to pump fluid.

However, the conventional diaphragm pump has a problem that it is difficult to inflow and discharge the fluid of the desired amount according to the difficulty of precisely adjusting the rotation amount of the eccentric rotating bearing.

In addition, the conventional diaphragm pump has a very complicated structure is difficult to assemble and disassemble, and thus there is a problem that maintenance is difficult.

In addition, in the conventional diaphragm pump, a safety valve provided to maintain a constant pressure of the fluid discharged from the pump and an external exhaust valve provided to discharge the fluid supplied from the pump to the outside are not integrated with the pump, respectively. As the total volume occupied by the device is increased, and thus the cost of producing the device is increased, there is a problem in that a trouble occurs frequently due to connecting the pump and the valve through a plurality of pipes.

SUMMARY OF THE INVENTION An object of the present invention is to provide a diaphragm pump capable of reducing cost and convenience of maintenance by integrating an external exhaust valve and a safety valve to simplify the structure and reduce the volume occupied by the apparatus.

The object is, according to the present invention, a main housing; A motor coupled to the lower side of the main housing; A diaphragm pump driving unit coupled to the driving shaft of the motor to supply air to the car seat airbag side by horizontal movement by the power transmitted from the motor; A valve housing coupled to an upper side of the main housing; And it is achieved by a diaphragm pump comprising an external exhaust valve provided inside the valve housing to discharge the air filled in the car seat airbag to the outside.

The valve housing may include a coupling housing having an upper surface opened and coupled to an upper side of the main housing; And a housing lead provided to cover an upper surface of the coupling housing and having an air discharge hole penetrated therein, wherein the external exhaust valve seals the air discharge hole when air is supplied to the car seat air bag. When the air filled in the car seat airbag is discharged to the outside, the air discharge hole may be selectively sealed or opened according to an input of an external signal so as to open the air discharge hole.

The external exhaust valve, the bracket is mounted to the lower surface of the coupling housing; A coil part accommodated in the bracket and generating a magnetic force according to an input of an external signal; A recovery spring inserted into a lower side of the yoke receiving hole formed in the center of the coil part; And is inserted into the upper side of the yoke accommodation hole, when the air filled in the car seat airbag to the outside is magnetized through the magnetic force transmitted from the coil portion is moved to the lower side while elastically pressing the recovery spring to the air discharge hole It may include a yoke for opening the.

The coupling housing may include a pair of connecting pipes provided at a lower side of the coupling housing in a direction crossing each other so that air discharged from the main housing may be introduced into the coupling housing; And a collecting tube for collecting the connecting tube so that air introduced through the connecting tube can be supplied into the coupling housing.

The coupling housing further includes a branch pipe branched from one side of the collecting pipe so as to be in communication with the outside, and flows through the connecting pipe when the pressure of the air flowing through the connecting pipe exceeds a predetermined range. It may further include a safety valve provided on the inside of the branch pipe to discharge a portion of the air to the outside.

The diaphragm pump may further include a check valve provided inside the collecting pipe to prevent the air filled in the car seat airbag from flowing back into the main housing.

The diaphragm pump driving unit may include a hub having a shaft insertion hole formed at a center thereof so that an eccentric shaft coupled to the driving shaft of the motor can be inserted therein, and four fitting grooves recessed along a side circumference thereof; Four connectors each including a fitting portion fitted to be rotatable relative to the fitting groove, a connecting rod extending from the fitting portion, and a head portion coupled to one side of the diaphragm; And four head caps respectively coupled to the head portion to cover the other side surface of the diaphragm, and four through holes may be formed in the main housing at positions adjacent to the head portion, respectively.

The diaphragm pump may further include four housing covers provided to cover the through holes, respectively, and recessed grooves each having a size substantially the same as the size of the through holes are recessed.

The diaphragm may include: an intake valve provided to allow air sucked from the inner space of the main housing to flow into the concave groove; And an exhaust valve disposed adjacent to the intake valve and provided to allow air received in the concave groove to flow out of the main housing.

The diaphragm is formed of an elastic material having elasticity, and the intake valve and the exhaust valve are each provided with a ventilation slit formed by cutting a portion of the diaphragm; And it may include a recovery unit provided in the ventilation slit.

The restoration unit, the support provided on the lower end; And an extension part extending from the support part and provided to have a width greater than the width of the support part.

The housing cover may include an intake groove formed to communicate with the concave groove at a position where the intake valve is disposed; And an exhaust hole formed to communicate with the concave groove at a position where the exhaust valve is disposed.

According to the present invention, it is possible to provide an external exhaust valve and a safety valve integrally with a diaphragm pump, thereby simplifying the structure and reducing the volume occupied by the diaphragm pump. It can be provided.

1 is a combined perspective view of a diaphragm pump according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of the diaphragm pump of FIG. 1. FIG.
3 is a plan view of a diaphragm pump driving unit of the diaphragm pump of FIG. 1.
4 is a perspective view of a hub of the diaphragm pump of FIG. 1.
5 is a perspective view of the connector of the diaphragm pump of FIG. 1.
6 is a perspective view of the diaphragm of the diaphragm pump of FIG. 1.
7 is a perspective view of the coupling housing of the diaphragm pump of FIG. 1 viewed from above.
8 is a perspective view of the coupling housing of the diaphragm pump of FIG. 1 as viewed from below.
9 is an exploded perspective view of the external exhaust valve of the diaphragm pump of FIG. 1.
10 to 13 is a schematic diagram showing the operating principle of the diaphragm pump of FIG.
14 is a schematic diagram showing the principle of operating the intake valve.
15 is a schematic diagram showing the principle of operation of the exhaust valve.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the well-known functions or constructions are not described in order to simplify the gist of the present invention.

In addition, the diaphragm pump is described below on the basis of being used for injecting air into the car seat airbag, but the scope of the present invention is not limited thereto, and the diaphragm pump of the present invention injects air into the car seat airbag. Obviously, it can be used for many other purposes.

1 is a combined perspective view of a diaphragm pump according to an embodiment of the present invention, Figure 2 is an exploded perspective view of the diaphragm pump of Figure 1, Figure 3 is a plan view of the diaphragm pump driving unit of the diaphragm pump of Figure 1 4 is a perspective view of a hub of the diaphragm pump of FIG. 1, FIG. 5 is a perspective view of a connector of the diaphragm pump of FIG. 1, FIG. 6 is a perspective view of a diaphragm of the diaphragm pump of FIG. 1, and FIG. 7. Is a perspective view of the coupling housing of the diaphragm pump of FIG. 1 viewed from above, FIG. 8 is a perspective view of the coupling housing of the diaphragm pump of FIG. 1 viewed from below, and FIG. 9 is an external exhaust valve of the diaphragm pump of FIG. 10 to 13 are schematic views showing the operation principle of the diaphragm pump of FIG. 1, FIG. 14 is a schematic diagram showing the principle of operating the intake valve, and FIG. Schematic diagram showing the principle of operation.

Referring to these drawings, the diaphragm pump 10 according to an embodiment of the present invention is a diaphragm coupled to the motor 100 including the drive shaft 110 and the drive shaft 110 of the motor 100 to be deflected. A pump driving unit 200 (hereinafter referred to as a pump driving unit 200), a diaphragm 300 fixedly coupled to the pump driving unit 200, and a main housing accommodating the pump driving unit 200 therein. 400, a housing cover 500 provided to cover the through hole 400a formed in the main housing 400, and coupled to an upper side of the main housing 400, and accommodates various valves 620, 640, and 700. The valve housing 600 and the external exhaust valve 700 provided to allow the air flowing out of the car seat airbag (not shown) to be discharged to the outside.

The motor 100 provides power for vibrating the pump driving unit 200 and includes a driving shaft 110 that is biased with respect to the eccentric shaft 120 coupled to the pump driving unit 200. In the present embodiment, the motor 100 may be provided as a general hydraulic motor, pneumatic motor, stepping motor, servo motor, and the like, and a detailed description thereof will be omitted.

The pump driving unit 200 allows the air inside the main housing 400 to flow into the space formed between the housing cover 500 and the recess 500a through the power transmitted from the motor 100, or the housing. The air accommodated in the space formed between the cover 500 and the recess 500a is discharged through the external outlet hole 630b.

The pump driving unit 200 has a shaft insertion hole 210a through which the eccentric shaft 120 is inserted, and a hub 210 having four fitting grooves 211 formed along the side circumference thereof, and a fitting groove 211. And four head caps 230 fixed to the diaphragm 300 are respectively coupled to the four connectors 220 that are fitted to each other and the head portion 223 of the connector 220.

The hub 210 has a shaft insertion hole 210a through which the eccentric shaft 120 is inserted, is formed through the central region, and four fitting grooves 211 spaced apart from each other at regular intervals along the side circumference are recessed. The rotational motion generated according to the rotation of the drive shaft 110 of 100 may be transferred to the horizontal motion of the diaphragm 300 in the + X or -X direction of FIGS. 10 to 13 and in the + Y or -Y direction. Exercise, the same as below).

The hub 210 has four fitting grooves 211 provided along the side circumference, a first cover 214 covering the lower side of the fitting groove 211, and a pair of partition walls forming the fitting grooves 211 ( A cover fitting protrusion 215 protruding from the upper end portion 212 and 213, and a second cover 216 coupled to the cover fitting protrusion 215 and covering the upper side of the fitting groove 211.

The fitting groove 211 is a space recessed from the surface of the hub 210 so as to be partitioned by a pair of partitions 212 and 213 spaced apart from each other at regular intervals. Here, the partitions 212 and 213 refer to a structure provided with a total of four spaced apart from each other at regular intervals along the side circumference of the hub 210 so that four fitting grooves 211 may be formed.

The partitions 212 and 213 are respectively provided such that the fitting groove 211 has a size slightly larger than that of the connector portion 221a of the connector 220 so that the connector 220 to be described later can exercise within a predetermined range. That is, it is provided to be spaced apart from each other on the basis of the gushing portion 221a of the connector 220 (see FIG. 4).

The first cover 214 is configured to be provided under the hub 210 to cover the lower end of the fitting groove 211, that is, the lower end of the partitions 212 and 213. The first cover 214 may include a first protrusion 214b into which one end of the first insertion protrusion 221b of the connector 220 is inserted, and a second protrusion (not shown) into which one end of the eccentric shaft 120 is inserted. Include.

The first protrusion 214b is provided to protrude from the lower surface of the first cover 214 so that one end of the first insertion protrusion 221b of the connector 220 is inserted. To this end, a first communication hole (not shown) communicating with the first protrusion insertion hole 214a of the first cover 214 is formed through the first protrusion 214b.

That is, the first insertion protrusion 221b of the connector 220 is inserted along the first communication hole of the first protrusion insertion hole 214a and the first protrusion 214b of the first cover 214, thereby driving the pump driving unit ( 200 may be temporarily fixed during assembly. Similarly, the eccentric shaft 120 that is biasedly coupled to the drive shaft 110 of the motor 100 penetrates through the second communication hole (not shown) and the hub 210 of the second protrusion of the first cover 214. By being inserted into the shaft insertion hole (210a) it can be temporarily fixed during assembly of the pump drive unit (200).

The cover fitting protrusion 215 is configured to protrude from the upper side of the partition walls 212 and 213 so that the second cover 216 described later can be easily coupled to the upper end of the hub 210. As described above, the fitting grooves 211 of the hub 210 are a total of four, and the partitions 212 and 213 for partitioning the fitting grooves 211 are provided in total of four bar fitting protrusion 215 is A total of four are provided, one for each pair of partitions 212 and 213.

The second cover 216 is provided to cover the upper end of the hub 210 to constrain the upper end of the connector 220 to fix the connector 220 together with the first cover 214.

The second cover 216 may include the third protrusion 216b protruding from the upper surface to insert one end of the second insertion protrusion 221c of the fitting portion 221 of the connector 220 and the eccentric shaft 120. And a fourth protrusion 216d formed at the central region so that one end thereof is inserted. In addition, the second cover 216 is formed with a fitting protrusion insertion hole 216f through which the cover fitting protrusion 215 described above is inserted.

The third protrusion 216b is provided to protrude from the upper surface of the second cover 216 so that one end of the second insertion protrusion 221c of the connector 220 is inserted. To this end, a third communication hole 216c communicating with the second protrusion insertion hole 216a of the second cover 216 is formed through the third protrusion 216b. That is, the second insertion protrusion 221c protruding upward of the fitting portion 221 of the connector 220 may include the third projection insertion hole 216a and the third projection third protrusion 216b of the second cover 216. By being inserted along the communication hole (216c) it can be temporarily fixed during assembly of the pump drive unit (200).

Similarly, the eccentric shaft 120 biasedly coupled to the drive shaft 110 of the motor 100 includes a shaft insertion hole 210a penetrating through the hub 210 and a fourth protrusion 216d of the second cover 216. By being inserted into the fourth communication hole 216e of the pump driving unit 200 can be temporarily fixed during assembly. In addition, the second cover 216 may be fixed to the upper end of the hub 210 by inserting and fixing four cover fitting protrusions 215 respectively along the fitting protrusion insertion hole 216f.

As such, the pump driving unit 200 of the present embodiment is provided so that the components can be simply fitted in sequence without welding the components, thereby facilitating the assembly and disassembly, whereby some of the components are broken. Even if it is possible, it can be easily replaced to facilitate the maintenance.

On the other hand, the connector 220 is fitted into the fitting groove 211 of the hub 210 is rotated by a predetermined angle in accordance with the movement of the eccentric shaft 120, the diaphragm 300 is fixed to this coupled to the horizontal direction It is a configuration that allows you to exercise.

The connector 220 includes a fitting portion 221 fitted to be rotatable relative to the fitting groove 211, a head portion 223 to which one side of the diaphragm 300 is coupled, a fitting portion 221, and a head. And a connecting rod 222 interconnecting the portions 223.

The fitting portion 221 is a portion which is fitted to be rotatable relative to the fitting groove 211, the protruding portion 221a provided at one end, and the protruding portion provided to protrude downward from the lower end of the protruding portion 221a The first insertion protrusion 221b and the second insertion protrusion 221c are provided to protrude upward from the upper end of the toothing portion 221a.

The additional part 221a is configured to be stepped at one end of the connecting rod 222 to have a relatively larger thickness than the connecting rod 222. The gushing portion 221a is fitted into the fitting groove 211 and then rotates relative to the fitting groove 211 according to the movement of the eccentric shaft 120 so that the connector 220 integrally connected thereto is fitted into the fitting groove 211. You will be able to interact with each other.

As described above, the pair of partitions 212 and 213 partitioning the fitting grooves 211 are provided with the grooves 211 spaced apart from each other at regular intervals such that the fitting grooves 211 have a larger width as compared with the thickness of the glands 221a. The part 221a rotates relative to the fitting groove 211 only within a predetermined range.

The connecting rod 222 connects the extremity part 221a and the head part 223, and is provided with a step from the reinforcement part 222a provided adjacent to one side of the head part 223 and the reinforcement part 222a. The extension part 222b provided to be extended to the fitting part 221 side is included.

The reinforcement part 222a is provided at one end of the extension part 222b to have a relatively large thickness compared to the extension part 222b. The reinforcement part 222a serves to reinforce the connecting rod 222, thereby ensuring a certain durability of the connecting rod 222. The extension part 222b refers to a thin plate-shaped member connecting between the fitting part 221 and the reinforcing part 222a.

The head portion 223 is configured to have a circular cross-sectional shape at one end of the reinforcing portion 222a. The head portion 223 penetrates through the center portion so that the pair of head insertion protrusions 223a provided on the left and right sides thereof and the bolt B fastened through the diaphragm 300 and the head cap 230 are inserted. The second cap fastening hole 223b is formed.

The head insertion protrusion 223a is inserted along the head coupling hole 300b formed through the diaphragm 300 and then fitted into the third cap fastening hole 230a formed in the head cap 230, thereby diaphragm 300. ) Is a part to be fixed between the connector 220 and the head cap 230.

The second cap fastening hole 223b communicates with the first cap fastening hole 300a formed through the diaphragm 300 and the fourth cap fastening hole 230b formed through the head cap 230. It is provided to provide a path for the bolt (B) is inserted. That is, after the diaphragm 300 is disposed between the connector 220 and the head cap 230, the first cap fastening hole 300a, the second cap fastening hole 223b, and the fourth cap fastening hole 230b are disposed. By inserting and fixing the bolt (B) along the diaphragm 300 is to be fixed between the connector 220 and the head cap 230.

On the other hand, the diaphragm 300 by changing the volume between the main housing 400 and the recessed groove 500a of the housing cover 500 so that the air received in the interior of the main housing 400 flows into the recessed groove 500a. Or, the air accommodated in the concave groove (500a) is configured to allow outflow. The diaphragm 300 is made of an elastic material having elasticity, and thus the shape of the diaphragm 300 may change in response to the movement of the connector 220.

The diaphragm 300 includes an intake valve 310 for introducing air into the concave groove 500a and an exhaust valve 320 provided to allow air received in the concave groove to flow out.

The intake valve 310 is configured to be provided at one side of the diaphragm 300 so that air received in the inner space of the main housing 400 can flow into the concave groove 500a. The intake valve 310 includes a vent slit 311 formed by cutting a portion of the diaphragm 300, and a restorer 312 provided in the vent slit 311.

Ventilation slit 311 is a configuration that is provided so that the air accommodated in the inner space of the main housing 400 is primarily introduced into the concave groove (500a). Ventilation slit 311 is provided to have a constant arc shape, as shown in FIG.

The restoration unit 312 is provided to be deformed to the concave groove 500a side according to the pneumatic pressure of the air flowing into the concave groove 500a through the ventilation slit 311 so that the air accommodated in the inner space of the main housing 400 is concave groove ( 500a) is configured to be introduced to the secondary side. That is, air received in the inner space of the main housing 400 is introduced while passing through the ventilation slit 311, in this case, the restoration unit 312 is predetermined toward the concave groove 500a by the pneumatic pressure of the introduced air. It is possible to increase the amount of inflow of air that is introduced by the angled deformation.

The restoration part 312 includes a support part 312a provided at the lower end and an extension part 312b extending upward from the support part 312a.

The support part 312a is provided to support the lower end of the expansion part 312b that is bent and deformed toward the concave groove 500a by the pneumatic pressure of air introduced from the inside of the main housing 400, and the expansion part 312b is aeration It is provided to have a shape substantially the same as the shape of the slit 311 is deformed by the pneumatic pressure of the air flowing from the inside of the main housing 400 or is configured to be elastically restored to the original position when there is no more inflow of air.

That is, when the air is introduced from the inside of the main housing 400, the expansion part 312b, which is supported by the support part 312a, is bent and deformed toward the concave groove 500a in accordance with the pneumatic pressure of the inflowed air. If the abnormal air is not introduced to the original state according to the characteristics of the diaphragm 300 is provided with an elastic material. In addition, since the restoration part 312 is provided such that one side thereof is in contact with the outer surface of the main housing 400, air may be introduced into the concave groove 500a from the inside of the main housing 400, but the concave groove 500a. By preventing the air received in the) does not flow back into the interior of the main housing 400 serves as a kind of check valve.

2 and 14, a process of driving the intake valve 310 is as follows.

In FIG. 2, the diaphragm 300 and the housing cover 500 disposed in the + X and + Y directions are disassembled, and the diaphragm 300 and the housing cover disposed in the −X and −Y directions are disassembled. The 500 is provided to have a structure symmetrical with the diaphragm 300 and the housing cover 500 disposed in the + X and + Y directions.

First, when the connector 220 in the left direction (-Y direction, see FIG. 2) shown in FIG. 14 is moved in the right direction (+ Y direction, see FIG. 2), the shape of the diaphragm 300 is changed and the housing cover is changed. The volume between the 500 and the diaphragm 300 increases. Accordingly, the air introduced from the lower side of the main housing 400 and accommodated in the main housing 400 passes through the intake valve 310 and the intake groove 500b of the housing cover 500 of the housing cover 500. It flows into the concave groove 500a. At this time, the expansion portion 312b of the intake valve 310 is deformed by bending the inlet groove 500b side of the housing cover 500 to create a passage of air introduced into the concave groove 500a.

On the other hand, the exhaust valve 320 is a configuration provided on one side of the diaphragm 300 adjacent to the intake valve 310 so that the air contained in the concave groove (500a) can flow out through the coupling housing 610 to the car seat airbag side. . The exhaust valve 320 includes a ventilation slit 321 formed by cutting a part of the diaphragm 300, and a restoration unit 322 provided in the ventilation slit 321. In addition, the restoration unit 322 includes a support part 322a provided at the lower end and an extension part 322b extending upward from the support part 322a.

The expansion part 322b is provided such that one side thereof is in contact with the side surface of the housing cover 500, but air received in the concave groove 500a may flow out, but external air does not flow into the concave groove 500a. By doing this, it acts as a check valve.

In addition, the matters concerning the ventilation slit 321, the support part 322a, and the expansion part 322b are the matters concerning the ventilation slit 311, the support part 312a, and the expansion part 312b of the intake valve 310 mentioned above. The same description is omitted since it is the same.

2 and 15, a process of driving the exhaust valve 320 is as follows.

First, when the connector 220 in the right direction (+ Y direction, see FIG. 2) shown in FIG. 15 moves in the right direction (+ Y direction, see FIG. 2), the shape of the diaphragm 300 is changed, and the housing cover is changed. Volume between the 500 and the diaphragm 300 is reduced. Accordingly, the air is received in the concave groove 500a of the housing cover 500, and the air passes through the exhaust hole 500c and the exhaust valve 320 of the housing cover 500. ) Is introduced, the air introduced into the connection pipe 611 is supplied to the car seat airbag side again through the collecting pipe 613 and the hose connection portion 631.

 At this time, the expansion part 322b of the exhaust valve 320 is bent and deformed into the inner side of the main housing 400 to create a passage of air introduced into the connection pipe 611.

On the other hand, the main housing 400 is a configuration in which a receiving space in which the pump drive unit 200 is accommodated is formed.

Grooves 410, 420, 430, and 440 recessed from the surface are formed in the upper end of the main housing 400, and the grooves 410, 420, 430, and 440 are connected to the connection pipe 611 of the valve housing 600 described later. , 612 are respectively inserted to allow air discharged from the main housing 400 to flow into the car seat airbag side.

On the other hand, the housing cover 500 is a configuration provided to cover the through-hole 400a formed to penetrate the side of the main housing 400.

The housing cover 500 has a concave groove 500a formed to have substantially the same size as the through hole 400a on the inner side thereof, and the concave groove 500a at a position where the intake valve 310 is provided. The intake groove 500b is formed, and the exhaust hole 500c is formed to communicate with the concave groove 500a at the position where the exhaust valve 320 is provided.

The concave groove 500a is configured to be recessed from the inner surface of the housing cover 500 so as to first store the air accommodated in the main housing 400 and then discharge it back to the outside, and the intake groove 500b is provided. Is a configuration in which the internal space of the main housing 400 and the concave groove 500a communicate with each other so that air introduced from the inside of the main housing 400 can move toward the concave groove 500a, and the exhaust hole 500c is concave. The concave groove 500a and the connection pipes 611 and 612 communicate with each other so that the air contained in the groove 500a can be discharged to the car seat airbag side.

Meanwhile, the valve housing 600 is configured to provide a space in which various valves 620, 640, and 700 can be accommodated, and at the same time, the air discharged from the main housing 400 can flow into the car seat airbag side.

The valve housing 600 includes a coupling housing 610 coupled to an upper side of the main housing 400, a safety valve 620 provided inside a branch pipe 614 of the coupling housing 610, and a coupling housing 610. It includes a housing lead 630 covering the upper surface of the check valve 640 provided inside the collecting pipe 613.

7 and 8, the coupling housing 610 is coupled to an upper side of the main housing 400 and has a configuration in which an external exhaust valve 700 to be described below is mounted. 612, a collecting pipe 613 for collecting the connecting pipes 611, 612, and a branch pipe 614 branched from the collecting pipe 613.

Both ends of the connection pipes 611 and 612 are respectively inserted into the grooves 410, 420, 430 and 440 of the main housing 400 described above, and the connection holes 611a communicated with each other to the connection pipes 611 and 612. , 612a are formed to penetrate so that air discharged through the exhaust valve 320 of the main housing 400 can be delivered to the collecting pipe 613 in accordance with the driving of the pump driving unit 200.

Collecting pipe 613 is a configuration that collects the air delivered from the connecting pipes (611, 612) and re-delivered into the coupling housing 610, the branch pipe 614 is a safety valve 620 can be inserted It is a configuration branched from one side of the collecting pipe 613 to provide a space.

The collecting hole 613a communicating with the connection holes 611a and 612a is formed through the inside of the collecting pipe 613, and the branching hole 614a communicating with the collecting hole 613a penetrates into the branch pipe 614. Is formed. In addition, the safety valve 620 is provided as a general check valve is inserted into the branch hole (614a).

According to this configuration, when the pressure of the air delivered through the collecting hole 613a exceeds a predetermined range, the safety valve 620 is opened to discharge a part of the air delivered to the outside. Of course, the safety valve 620 serves to prevent the outside air flows back into the coupling housing 610 along the branch hole (614a).

In addition, a check valve 640 is provided inside the collecting pipe 613 to allow air delivered along the collecting hole 613a to be discharged to the outer outlet hole 630b of the housing lid 630. In addition, the check valve 640 serves to prevent the air filled in the car seat airbag to flow back to the main housing 400 side.

The housing lead 630 is configured to cover the open upper surface of the coupling housing 610. A hose connection part 631 is provided at an upper side of the housing lead 630 to connect a hose connected to the car seat airbag, and an external outlet hole 630b is formed through the hose connection part 631 to form an inside of the coupling housing 610. The air contained in the air can be delivered to the car seat airbag side.

In addition, an air discharge hole 630a is formed at one side of the housing lead 630 to allow the air filled in the car seat airbag to be re-extracted to the outside.

On the other hand, the external exhaust valve 700 is configured to selectively open and close the air discharge hole (630a) formed in the housing lead 630 according to the input of the external signal. Here, the optional means to seal the air discharge hole (630a) when inflating the car seat airbag according to the signal input by the driver, and to open the air discharge hole (630a) to remove the air from the car seat airbag it means.

As illustrated in FIG. 9, the external exhaust valve 700 includes a bracket 710 mounted on the lower surface of the coupling housing 610, a coil part 720 accommodated in the bracket 710, and a coil part 720. Recovery spring 730 is inserted into the yoke receiving hole (720a) of the) and the yoke (740) for selectively opening and closing the air discharge hole (630a) in accordance with the input of the external signal.

The bracket 710 is a magnetic metallic member inserted into and mounted in the bracket receiving groove 610a provided on the lower surface of the coupling housing 610. The coil part 720 is provided with a plurality of coils wound therein to input an external signal. Therefore, the yoke 740 is magnetized.

The yoke receiving hole 720a is formed through the center portion of the coil unit 720. A recovery spring 730 is first inserted along the yoke receiving hole 720a, and the yoke 740 is inserted upward. As the shield plate 750 is covered, the external exhaust valve 700 of the solenoid valve type is completed.

In this configuration, when the driver intends to inflate the car seat airbag, power is not supplied to the external exhaust valve 700. Accordingly, the yoke 740 blocks the air discharge hole 630a by the recovery spring 730. Stays in the state.

If the driver wants to remove the air from the car seat airbag, electric power is supplied to the external exhaust valve 700. Accordingly, the coil unit 720 magnetizes the yoke 740 and the magnetized yoke 740 has a recovery spring ( 730 is moved to the side of the bracket 710 while pressing. As the yoke 740 moves, the air discharge hole 630a is opened, and the air filled in the car seat airbag can be discharged to the outside.

Now, the driving principle of the diaphragm pump 10 according to the present embodiment will be briefly described.

When the driver inputs an external signal to inflate the car seat airbag, first, when the power is supplied through the terminal 100a of the motor 100, the drive shaft 110 rotates, and thus the eccentric shaft coupled to the drive shaft 110. 120 will exercise. However, the eccentric shaft 120 is coupled to be deflected with respect to the drive shaft 110 of the motor 100, the movement of the eccentric shaft 120 is based on the same axis as the drive shaft 110 of the motor 100 Rather than the rotational movement, the hub 210 becomes an eccentric movement with respect to the center axis of the drive shaft 110 to draw a large circle based on the center axis of the drive shaft 110 of the motor 100.

As such, when the hub 210 is eccentric, the connector 220 fitted in the fitting groove 211 of the hub 210 rotates relative to the fitting groove 211, and thus the diaphragm 300 is rotated. The volume of the space formed between the diaphragm 300 and the concave groove 500a is changed.

That is, as shown in FIGS. 10 and 11, when the hub 210 rotates from 0 ° to 90 °, the hub 210 is provided in the left direction of the diaphragm pump 10 (in the -X direction of FIG. 10, hereinafter the same). The connector 220 is inclined in an upward direction (the same as the + Y direction in FIG. 10, hereinafter), and accordingly, a space S1 formed between the left diaphragm 300 and the concave groove 500a in the left direction. The deformation of the volume decreases.

Similarly, the connector 220 provided in the upper direction of the diaphragm pump 10 is inclined in the right direction (the same as in the + X direction of FIG. 10, hereinafter), and thus the upper direction of the diaphragm 300 and the upper side thereof. Deformation in which the volume of the space S2 formed between the concave grooves 500a in the direction increases is caused.

Similarly, the connector 220 provided in the right direction of the diaphragm pump 10 performs an inclined upward movement, and is provided in the lower direction of the diaphragm pump 10 (in the -Y direction of FIG. 10, hereinafter same). Since the connector 220 is inclined downward, the volume of the space S3 formed between the right diaphragm 300 and the concave groove 500a in the right direction increases, and the lower diaphragm 300 ) And the volume of the space (S4) formed between the recessed groove (500a) in the downward direction is to be reduced.

According to the deformation of each of the spaces S1, S2, S3, and S4, the air accommodated in some of the spaces S1 and S4 is transferred to the external outlet hole 630b of the housing lead 630 through the coupling housing 610, thereby allowing the car seat. It is used to inflate the air bag, and the air flowing from the main housing 400 can be accommodated in the other partial spaces S2 and S4.

That is, the air received inside the main housing 400 is moved to the concave groove 500a through the intake valve 310 and the intake groove 500b, and then stored in one space S2, and the other space ( The air stored in S1 is discharged along the exhaust hole 500c formed to communicate with the concave groove 500a, and then the exhaust valve 320, the connection pipes 611 and 612, the collection pipe 613, and the hose connection part 631. ) Is introduced into the car seat airbag side.

When the hub 210 rotates from 90 ° to 180 °, when the hub 210 rotates from 180 ° to 270 °, and when rotates from 270 ° to 0 °, the volume change of the space S1, S2, S3, S4, Accordingly, the matters related to the inflow and outflow of air are similar to those described above, and thus a detailed description thereof will be omitted.

In addition, when discharging the air of the car seat airbag, only the external exhaust valve 700 is driven without driving the pump driving unit 200 so that the yoke 740 opens the air discharge hole 630a, and the car seat airbag and the atmospheric pressure The air contained in the car seat airbag can be discharged to the outside according to the pressure difference of the.

The diaphragm pump 10 of the present embodiment can be provided with the external exhaust valve 700 and the safety valve 620 integrally to the diaphragm pump 10 to simplify the structure and to reduce the volume occupied by the device to reduce costs And it has the advantage that can facilitate the maintenance.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious to those who have. Accordingly, it should be understood that such modifications or alterations should not be understood individually from the technical spirit and viewpoint of the present invention, and that modified embodiments fall within the scope of the claims of the present invention.

10: diaphragm pump 100: motor
200: pump drive unit 300: diaphragm
400: main housing 500: housing cover
600: valve housing 700: external exhaust valve

Claims (12)

A main housing;
A motor coupled to the lower side of the main housing;
A diaphragm pump driving unit coupled to the driving shaft of the motor to supply air to the car seat airbag side by horizontal movement by the power transmitted from the motor;
A valve housing coupled to an upper side of the main housing; And
It includes an exhaust valve provided inside the valve housing to discharge the air filled in the car seat airbag to the outside,
The diaphragm pump drive unit,
A hub having a shaft insertion hole formed at a center thereof so that the eccentric shaft coupled to the driving shaft of the motor can be inserted into the center portion, and four fitting grooves recessed along the side circumference thereof;
Four connectors each including a fitting portion fitted to be rotatable relative to the fitting groove, a connecting rod extending from the fitting portion, and a head portion coupled to one side of the diaphragm; And
Four head caps respectively coupled to the head portion to cover the other side of the diaphragm,
The main housing, the diaphragm pump, characterized in that the four through holes are formed through each of the positions adjacent to the head portion. The method of claim 1,
Wherein the valve housing comprises:
A coupling housing having an upper surface opened and coupled to an upper side of the main housing; And
It is provided to cover the upper surface of the coupling housing and includes a housing lead through which the air discharge hole is formed through,
The exhaust valve
When the air is supplied to the car seat air bag side, the air discharge hole is sealed, and when the air filled in the car seat air bag is discharged to the outside, the air discharge hole is selectively opened according to the input of an external signal. Diaphragm pump, characterized in that for sealing or opening the air discharge hole. The method of claim 2,
The exhaust valve
A bracket mounted to a bottom surface of the coupling housing;
A coil part accommodated in the bracket and generating a magnetic force according to an input of an external signal;
A recovery spring inserted into a lower side of the yoke receiving hole formed in the center of the coil part; And
When the air filled in the car seat airbag is discharged to the outside and is discharged to the outside, the yoke accommodation hole is magnetized through a magnetic force transmitted from the coil unit, and is moved downward to elastically press the recovery spring to open the air discharge hole. A diaphragm pump comprising an opening yoke. The method of claim 2,
The coupling housing,
A pair of connecting pipes provided on the lower side of the coupling housing in a direction crossing each other so that air discharged from the main housing can be introduced; And
And a collecting pipe for collecting the connecting pipe so that air introduced through the connecting pipe can be supplied into the coupling housing. 5. The method of claim 4,
The coupling housing,
Further comprising a branch pipe branched from one side of the collecting pipe to be in communication with the outside,
When the pressure of the air flowing through the connecting pipe exceeds a predetermined range further comprises a safety valve provided on the inside of the branch pipe to discharge a portion of the air flowing through the connecting pipe to the outside Diaphragm pump characterized by the above-mentioned. 5. The method of claim 4,
And a check valve provided inside the collecting pipe to prevent the air filled in the car seat airbag from flowing back into the main housing. delete The method of claim 1,
The diaphragm pump further comprises four housing covers provided to cover each of the through holes, each recess having recesses having substantially the same size as the through hole. 9. The method of claim 8,
The diaphragm is,
An intake valve provided to allow air sucked from the inner space of the main housing to flow into the concave groove; And
And an exhaust valve disposed adjacent to the intake valve and provided to allow air received in the concave groove to flow out of the main housing. 10. The method of claim 9,
The diaphragm is made of an elastic material having elasticity,
The intake valve and the exhaust valve, respectively,
A ventilation slit formed by cutting a portion of the diaphragm; And
Diaphragm pump, characterized in that it comprises a restorer provided in the ventilation slit. The method of claim 10,
The restoration unit,
A support provided at the lower end; And
And an extension part extending from the support part and provided to have a width greater than the width of the support part. 10. The method of claim 9,
The housing cover,
An intake groove formed to communicate with the concave groove at a position where the intake valve is disposed; And
And an exhaust hole formed to communicate with the concave groove at a position where the exhaust valve is disposed.

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